Table 1 Summary of physicochemical properties of ZnO NPs and generated aerosol
ZnO NPs | ||
|---|---|---|
Primary particle size1 | 15 ± 4 nm (26 ± 11 nm)# | |
Crystalline or amorphous | Crystalline, zincite | |
Surface functionality | CO32−, OH−, CH | |
BET surface area2 | 47 ± 1 m2/g (15 ± 4 m2/g)# | |
Nanoparticle dissolution | Gamble’s solution (pH 7.4): < 1% | |
ALF* (pH 4.5): 100% | ||
Aerosol characterization in the whole-body exposure chamber: | ||
Sub-acute study | Sub-chronic study | |
Aerosol size distribution3 | GM = 46 nm | GM = 36 nm |
GSD = 1.8 | GSD = 1.8 | |
Exposure mass concentration2 | 3.6 ± 0.5 mg/m3 | 3.3 ± 0.6 mg/m3 |